High Temperature Lignin Separation for Improved Yields in Ethanol Organosolv Pre-Treatment

The full utilization of renewable raw materials is necessary for a sustainable economy. Lignin an abundant biopolymer, but currently mainly used energy production. Ethanol organosolv pre-treatment produces high-quality lignin, still faces substantial economic challenges. solubility increases with temperature, and previous studies have shown that it reprecipitates during cooling after the pre-treatment. Thus, possibility optimization lignin production this process can be separation extract residual biomass at high temperatures. In work, was extracted from wheat straw 180 °C, separated remaining solids several temperatures results show 10.1 g/kg 2.2 carbohydrates are dissolved temperature which reduced to 8.6 1.2 cooling. precipitation extracts °C showed higher concentration in 46% improvement yield solid while there no significant impact on purity.